Island



(No Model.) H. MOGOVERN.

GRATE.

No. 554,193. Patented Feb. 4, 1896.

UNITED STATES PATENT OFFICE.

HUGH MCGOVERN, OF PROVIDENCE,- RHODE ISLAND.

GRATE.

SPECIFICATION forming part of Letters Patent No. 554,193, dated February 4, 1896.

Application. filed July 29, 1895. Serial No. 557,514. (No model.)

To all whom it may concern:

Beit known that I, HUGH MGGOVERN, acitizen of the United States, residing at Providence, in the State of Rhode Island, have invented a new and useful Improvement in Grates, of which the following is a specification.

The nature of my invention consists in a grate divided into sections by means of compartments, the sides of which extend downward from the grate, whereby the draft may be caused to be less at some portions of the I grate than at others, with resultingeconom'y of fuel, as hereinafter set forth andclaimed.

In the accompanying drawings, Figure 1 represents a transverse section of a grate formed of single grate-bars placed side by side. Fig. 2 represents a central section of a circular grate, taken in the line 2 2 of Fig. 3. Fig. 3 represents a top View of the circular grate.

In the drawings, Fig. 1, a a represent the grate-bars, which are arranged in sections A A, the grate-bars in the latter being preferably arranged closer together than in the former. The intermediate grate-bars a a are provided with the downward extensions a which form the sides of the compartments 1) b, the compartments 1) being provided with the inwardly-directed inclined wings c o,by means of which the upward draft therein will be impeded, so that the coal over the gratesections A will not be consumed as rapidly as that over the sections A, in which the upwarddraft is free, the gases arising from the heated coal over the sections A of the grate, and the air which is mingled therewith will by coming in contact with the flame from the burning coal over the sections A cause rapid explosions, evolving an intense heat.

The improvement is shown as applied to a circular grate in Figs. 2 and 3, in which the sheetiron pipe (1 is connected to the annular flange c at the lower side of the grate, thecentral bars, f, of the grate being preferably arranged closer to each other than the distance between the outer radiallydirected gratebars, f. The pipe 01 is provided interiorly with the inclined wings o c, which serve to check the upward flow of air through the grate-section A, so that the fire will be hottest at the outer portion of the grate; but other suitable means may be employed for checking the draft in the compartment 1).

By my improvement a great saving of coal will be effected in furnaces, the rising gas and air from the heated coal producing an intense heat in the furnace and creating a strong draft through the sections A of the grate.

The inwardly-directed wings a a may be dispensed with when the grate-bars in the sections A are placed sufficiently near each other to properly check the draft; but when the grate-bars in the several sections are placed at about the same distance apart suitable means should be employed to contract the air-inlet opening under the said sections A, as by inclining the walls of the compartments under the said sections, or otherwise.

I claim as my invention 1. A flat grate, divided into sections by means of compartments below the grate, the sides of the compartments extending downward from the under side of the grate, and serving to increase the draft of air through the alternate sections of the grate, and means for restricting the flow of air through the intermediate sections, substantially as described.

2. A fiat grate, in which the gratabars in alternate sections are arranged at a greater distance apart than are those in the intermediate sections, and having below the grate, compartments, the sides of which extend downwardly, and serve to increase the draft of air through the sections of the grate the bars of which are farthest apart, and over which the quick combustion is maintained.

HUGH MCGOVERN. Witnesses:

SooRArEs SOHOLFIELD, HENRY E. REYNOLDS. 

